/*
 * Copyright 2010 Christoph Widulle (christoph.widulle@googlemail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS"
 * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */



package com.android1.amarena2d.actions.movement;

import com.android1.amarena2d.actions.base.Action;
import com.android1.amarena2d.nodes.behavior.ActionTarget;

public class TerminalAccelerateMove extends Action {

    protected float accelerateX;
    protected float accelerateY;
    protected float terminalVelocityX;
    protected float terminalVelocityY;
    protected Move move;

    protected boolean done;

    public TerminalAccelerateMove(Move move, float accelerateX, float accelerateY, float terminalVelocityX, float terminalVelocityY) {
        this.move = move;
        this.accelerateX = accelerateX;
        this.accelerateY = accelerateY;
        this.terminalVelocityX = terminalVelocityX;
        this.terminalVelocityY = terminalVelocityY;
    }

    public static TerminalAccelerateMove $(Move move, float accelerateX, float accelerateY, float terminalSpeedX, float terminalSpeedY) {
        return new TerminalAccelerateMove(move, accelerateX, accelerateY, terminalSpeedX, terminalSpeedY);
    }

    @Override
    public void start(ActionTarget target) {
        assert move.getTarget() == target : "Move action has different target";
        super.start(target);
    }

    public void reset(Move move, float accelerateX, float accelerateY, float terminalSpeedX, float terminalSpeedY) {
        this.move = move;
        this.accelerateX = accelerateX;
        this.accelerateY = accelerateY;
        this.terminalVelocityX = terminalSpeedX;
        this.terminalVelocityY = terminalSpeedY;
    }

    @Override
    public TerminalAccelerateMove copy() {
        return TerminalAccelerateMove.$(move, accelerateX, accelerateY, terminalVelocityX, terminalVelocityY);
    }

    @Override
    public void tick(float delta) {

        if (terminalVelocityX < move.velocityX)
            move.velocityX = (move.velocityX + accelerateX * delta);

        if (terminalVelocityY < move.velocityY)
            move.velocityY = (move.velocityY + accelerateY * delta);

        done = true;

        if (accelerateX > 0)
            if (move.velocityX > terminalVelocityX)
                done = false;
            else if (move.velocityX < terminalVelocityX)
                done = false;

        if (accelerateY > 0)
            if (move.velocityY > terminalVelocityY)
                done = false;
            else if (move.velocityY < terminalVelocityY)
                done = false;

        if (done) {
            move.velocityX = terminalVelocityX;
            move.velocityY = terminalVelocityY;
        }
    }

    @Override
    public boolean isDone() {
        return done;
    }

    @Override
    //todo not correct
    public TerminalAccelerateMove reverse() {
        return TerminalAccelerateMove.$(move, accelerateX, accelerateY, terminalVelocityX, terminalVelocityY);
    }

}